Enfield, Conn., police met with federal investigators to piece together evidence in Sunday's theft at the Eli Lilly warehouse in which burglars allegedly stole $70 million worth of Prozac, Cymbalta and Zyprexa, The Hartford Courant reported Tuesday.

The theft was "extremely substantial" and well planned, Chief Carl Sferrazza said.

No painkillers or narcotics were taken, said a spokesman for Eli Lilly.

"This will turn out to be, unfortunately, the largest theft that our town has ever experienced," Sferrazza said.

Sferrazza speculates the thieves were sophisticated, allegedly scaling up the walls, cutting a hole in the roof and rappelling down before disabling the alarm and proceeding "to steal multiple pallets of prescription drugs," he said.

"I can tell you it was many, many pallets," he said this morning. "They might have spent at least a couple of hours unloading all these drugs."

Police arrived at the warehouse about 1:50 p.m. when the theft was discovered. Despite the efforts of a scent-sniffing police dog, no suspects were found, the newspaper said.